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From "Craig R. McClanahan" <craig...@apache.org>
Subject Re: MVC in Tomcat is hard
Date Mon, 05 Nov 2001 00:03:09 GMT


On 3 Nov 2001, Dr. Evil wrote:

> Date: 3 Nov 2001 09:55:22 -0000
> From: Dr. Evil <drevil@sidereal.kz>
> Reply-To: Tomcat Users List <tomcat-user@jakarta.apache.org>
> To: tomcat-user@jakarta.apache.org
> Subject: MVC in Tomcat is hard
>
>
> I'm trying to use the Model-View-Controler design approach in Tomcat.
> Here's what I'm trying to do:
>
> I'll put the Model stuff in a servlet.  The View stuff will go into a
> jsp page (actually a custom tag lib).  What I need to do is, when I
> view a page like foo.jsp, the servlet needs to get invoked to set up
> some state, so the tags can then dispaly it.  So, let's say the client
> requests
>
> http://host/dir/foo.jsp
>
> I want to have a servlet, let's call it controler.class, be called,
> do its stuff, and then get a RequestDispatcher, and then do
> rd.forward() to foo.jsp.  This doesn't seem to be possible.  Is there
> a way to do this?
>

Check out some of the existing MVC-based frameworks like Struts
<http://jakarta.apache.org/struts> which do exactly this sort of thing.
The example app that comes with Struts illustrates exactly how to solve
this particular problem.

Craig


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